The Star of David

What is the Star of David? The Random House College Dictionary defines the Star of David as, "a figure symbolic of Judaism, consisting of a six-pointed star formed of two identical equilateral triangles placed one upon the other so that each side of one is trisected by two sides of the other triangle." The Hebrew expression describing this shape is Magen Daweed, Magen David or Mogen Dovid, depending upon dialect. The word Magen is accurately translated as shield. Thus the shape to which the expression "Magen Daweed" refers is best translated Shield of David vs. Star of David. I used to wear a Magen Daweed as a statement that I was a Hebrew because other Hebrews wore one, but I did not consider its origin or what it represented. At some point I began to wonder what was the origin of the Magen Daweed and what was its significance. I could not find any scriptural reference describing the symbol/icon commonly referred to as the Star or Shield of David. My research outside of the scriptures was no more satisfactory (see http://en.wikipedia.org/wiki/Star_of_David#Shield_form). I found that the symbol/icon was advocated by some as an ancient symbol having spiritual signifcance, Messianic implications, magical powers, etc. It was disparaged by others as pagan, satanic, occultic and a more recent invention. Who then, living or dead, could speak with authority about the Shield of David if not David himself. David does indeed speak of his shield in 2nd Samuel 22:3 and in Psalms 3:3, 28:7, 59:11, 119:4, and 144:2. David states unequivocally that YAH is his shield. With that understanding, I lost the desire to wear a so called Shield of David. YHWH is the true shield vs. an icon of disputed origin, an item of jewelry, a national/cultural symbol or even an implement of physical armor.